[EMAIL PROTECTED] wrote:
I have a file with the columns: StockSymbol, OptionSymbol,
StockPrice, StrikePrice, ExpiryDate
For each StockSymbol, ExpiryDate, I would like to list just 4 of the
records where the StrikePrice is lower than the StockPrice.
This should do it:
select * from Options o1
where rowid in (
select o2.rowid from Options o2
where o1.StockSymbol = o2.StockSymbol and
o1.ExpiryDate=o2.ExpiryDate
and o2.StrikePrice < o2.StockPrice
limit 4);
I wouldn't be surprised if it turns out to be faster to just retrieve
all records and skip over all but the first four in each group in your
program.
Igor Tandetnik
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